Computer display screen portion with a transitional graphical user interface



FIG. 1 is a front view of a computer display screen portion with a transitional graphical user interface showing a first image in a sequence according to a first embodiment of the claimed design;

FIG. 2 is a front view showing a second image thereof;

FIG. 3 is a front view showing a third image thereof;

FIG. 4 is a front view showing a fourth image thereof;

FIG. 5 is a front view showing a first image in a sequence according to a second embodiment of the claimed design;

FIG. 6 is a front view showing a second image thereof;

FIG. 7 is a front view showing a third image thereof; and,

FIG. 8 is a front view showing a fourth image thereof.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-4 and FIGS. 5-8.

The process or period in which an image transitions to another image forms no part of the claimed design.

The longer broken-line showing of a portion of a computer is included for the purpose of illustrating environmental structure and forms no part of the claimed design. The intermediate-length broken-line showing of a display screen of the computer, as well as the features within the interface shown in still shorter broken-lines, are included for the purpose of illustrating portions of the article and form no part of the claimed design.

Gray shading depicts a contrast in appearance. 

CLAIM The ornamental design for a computer display screen portion with a transitional graphical user interface, as shown and described. 